1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 #include <assert.h> 4 #include <linux/bpf.h> 5 #include "libbpf.h" 6 #include "bpf_load.h" 7 #include "sock_example.h" 8 #include <unistd.h> 9 #include <arpa/inet.h> 10 #include <sys/resource.h> 11 12 struct pair { 13 __u64 packets; 14 __u64 bytes; 15 }; 16 17 int main(int ac, char **argv) 18 { 19 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; 20 char filename[256]; 21 FILE *f; 22 int i, sock; 23 24 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); 25 setrlimit(RLIMIT_MEMLOCK, &r); 26 27 if (load_bpf_file(filename)) { 28 printf("%s", bpf_log_buf); 29 return 1; 30 } 31 32 sock = open_raw_sock("lo"); 33 34 assert(setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, prog_fd, 35 sizeof(prog_fd[0])) == 0); 36 37 f = popen("ping -c5 localhost", "r"); 38 (void) f; 39 40 for (i = 0; i < 5; i++) { 41 int key = 0, next_key; 42 struct pair value; 43 44 while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) { 45 bpf_map_lookup_elem(map_fd[0], &next_key, &value); 46 printf("ip %s bytes %lld packets %lld\n", 47 inet_ntoa((struct in_addr){htonl(next_key)}), 48 value.bytes, value.packets); 49 key = next_key; 50 } 51 sleep(1); 52 } 53 return 0; 54 } 55